Governing contrivance for jet-impelled water-motors.



J. ORTEN-BOVING. GOVERNING GONTRIVANOB FOR JET IMPELLED WATER MOTORS.

APPLICATION FILED MAY3. 1910f Patented May 30, 1911.

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JENS ORTEN-BOVING, OF LONDON, ENGLAND.

GOVERNING CONTRIVANCE FOR JET-IMPELLED WATER-MOTORS.

Specification of Letters Patent.

Patented May 30, 1911.

Application filed May a, 1910. Serial No. 559,117.

To all whom it may concern:

Be it known that I, JENS ORTEN-BOVING, subject of the Kin of Sweden,residing at 9% Union Court, 61d Broad street, in the city of London,England, have invented new and useful Improvements in GoverningContrivances for Jet-Impelled WVater-Motors, of Which the following is aspecification.

This invention relates to improvements in governors employed to regulatethe supply of water to jet-impelled motors, which governors are of thetype in which, when a reduction of speed or power is required, the

first operation performed is to divert a portion of the issuing jet ofwater, this action being followed by a diminution of the section of thejet at a rate sufliciently gradual to avoid an undue increment ofpressure in the water-supply pipe which is caused by the change ofmomentum of the flowing mass of water contained Within the pipe, thesecond effect being caused by the operation of what will be described asan interceptor.

In the accompanying drawing is shown, as a representative example, aform of construction embodying the invention the nature of which isabove described.

In this drawing :Figure 1 is a part sectional elevation, and :Fig. 2 isa transverse view of a detail.

In Fig. 1 a represents a Pelton or other kind of water-wheel which isdriven by a jet of water conveyed by a pipe 0 and delivered through anozzle (Z, the area of discharge through which is regulated by a pointedvalve e whose axis coincides with those of the nozzle and jet.

The contour of the nozzle and valve are such as to direct a stream ofannular section to converge into a cylindrical jet the diameter of whichdiminishes as the valve is moved from right to left and so constrictsthe area ofdischarge and diminishes the power de veloped.

The diminution of power by a reduction in the quantity of waterdelivered through the nozzle must be effected very slowly or a dangerouspressure will occur in the supply pipe by the abrupt arrest of themomentum of the moving mass of water in what may be a very long supplypipe, and yet, when the load or work to be performed lessens, and oftenquite suddenly, it is requisite that the power exerted should becorrespondingly diminished in a very prompt manner to prevent the wheeland the machinery driven thereby from acquiring an injurious speed. Thisis effected by interposing in a portion of the section of the jet adeflector P which is pivotally mounted on the spindle a of theWater-wheel or other appropriately situated pivot, thereby diverting aportion of the stream and preventing it from impinging on the blades ofthe wheel.

The interposition of the deflector is effected by some form. ofgovernor, not shown, which operates on the spindle g and angularlydisplaces it anti-clockwise as the speed of revolution increases, themovement of the spindle being transmitted to the deflector f by a leverkeyed to the spindle and connecting rod 9 The displacement of thegovernor-spindle 9 also causes, by means of a second lever k andconnecting rod h a piston h to be thrust away from the left end of acylinder 70 against the pressure of fluid which is admitted to thecylinder through a flexible pipe connected to the orifice 70 Normally,the piston It will be retained at the left end of the cylinder by thefluid pressure within the cylinder it, but when an increase of speedoccurs the piston will move away from the left end of the cylinder andeject some of the fluid. The cylinder is constitutes a hollow plunger ofa fixed cylinder m and the fluid pressure within 70 will persistentlytend to replace the piston 71 to the left end, by causing the cylinder7: to move to the right. Now the space within the fixed cylinder at notoccupied by the plunger-cylinder 7:, is filled with a viscous liquidsuch as oil, and this space is placed in communication with a reservoir72 by a passage 0 which can be throttled to any desired degree by anadjustable valve 0 On account of the passage 0, the liquid in at willleak into the reservoir a when a pressure is applied to force theplunger-cylinder is to the right but, by regulating the constriction 0the rate of displacement of the plunger-cylinder can be made as slow asmay be desired. When by the movement of the cylinder 70 to the right thepiston it again occupies the left end of the cylinder, further progressof the plunger-cylinder will be arrested because then the fluid-pressureon the cylinder-end will be balanced by the equal and opposite pressureon the piston It.

By means of a piston-rod 1), link 9, lever r and link 8, the slowmovement of the plunger-cylinder 7c is communicated to thebefore-mentioned intercepting valve 6 the position of the deflector fand the position of the intercepter e to be definitely related to eachother and both dependent on the position assumed by a single governor.

The ratios of the interposed levers are so proportioned that in allpositions, when the lost motion has been recovered, the deflector willstand clear of the et with a minimum interval so as to be in position toeffect a further reduction of power with the least displacement of thegovernor and delay. In

Fig. 2, which shows the deflector and the section of the jet of water onan enlarged scale, the large circle 6 drawn with a full line, isintended to represent the diameter of the jet when. the valve 6 is fullyopen, the simultaneous position of the deflector being represented infull lines by P. When the valve is partially closed, the smallerdashdotcircle b shows the section of the jet and the correspondingposition of the deflector is shown in dash-dot lines by F.

Connecting the cylinder m and the reservoir n is an additional passagecommanded by a valve t which closes when the plungercylinder 70 moves tothe right but opens to permit the free back-flow of liquid from thereservoir, when it moves to the left. Accordingly, when increase ofpower is required, there will be no constraint against the promptopening of the intercepting valve, the deflector being simultaneouslyproportionately moved so as to avoid interference with the stream whichattains an enlarged section.

I claim:

1. In a j et-impelled water-motor, a nozzle,

a shaft adapted to be angularly displaced by a governor, a jet-deflectorconnected therewith, a piston also connected therewith, a cylindercontaining said piston and a fluid under pressure, a dash-pot of whichsaid cylinder constitutes the plunger, a jet-intercepting valve in saidnozzle and means connecting said cylinder-plunger with said valve.

2. In a j et-impelled water-motor, a nozzle, a shaft adapted to beangularly displaced by a governor, a jet-deflector connected therewith,a piston also connected therewith, a cylinder containing said piston anda fluid under pressure, a dash-pot of which said cylinder constitutesthe plunger, means for regulating the eject-ion of fluid from saiddash-pot, a jet-intercepting valve in said nozzle and means connectingsaid cylinderplunger with said valve.

3. In a j et-impelled water-motor, a nozzle, a shaft adapted to beangularly displaced by a governor, a jet-deflector connected therewith,a piston also connected therewith, a

cylinder containing said piston and a fluid under pressure, a dash-potof which said cylinder constitutes the plunger, a non-return Valveopening into said dash-pot, a jetintercepting valve in said nozzle andmeansconnecting said cylinder-plunger with said intercepting valve.

4. In a jet-impelled water-motor, a nozzle, a shaft adapted to beangularly displaced by a governor, a jet-deflector connected therewith,a piston also connected therewith, a cylinder containing said piston anda fluid under pressure, a dash-pot of which said cylinder constitutesthe plunger, means for regulating the ejection of fluid from. saiddash-pot, a non-return valve opening into said dash-pot, ajet-intercepting valve in said nozzle and means connecting saidcylinder-plunger with said intercepting valve.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

J ENS ORTEN-BOVING.

Witnesses RIPLEY WVILsoN, HERBERT D. J AMESON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

